From VCRs flashing 12:00 and tapes filling rooms to laptops logging every move and hard drives housing multiple seasons, the evolution of video in the NHL is as eye-popping as any recent growth in the game.

What once required endless hours and lugging recording machines from city to city can now be performed in minutes with a simple click.

It used to take days for a player to see his individual shifts, and now they are loaded onto his iPad by the time he pulls in the driveway after a home game or steps onto the team’s plane following a road game.

Sean Ferrell, who is in his fifth season as the Blues’ video coach, is aware of the relative ease of some of his tasks compared what his predecessors went through, but certainly not to the point where it makes him feel guilty.

“No, because the one thing technology has done, it means we’re going through 10 times more data, whittling it down to what we think is really important,” Ferrell said. “It...

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